| 电网对称故障下基于active crowbar双馈发电机控制 |
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| 引用本文： | 张学广,徐殿国.电网对称故障下基于active crowbar双馈发电机控制[J].电机与控制学报,2009,13(1). |
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| 作者姓名： | 张学广 徐殿国 |
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| 作者单位： | 哈尔滨工业大学,电气学院,黑龙江,哈尔滨,150001 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金，台达环境与教育基金会资助项目 |
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| 摘 要： | 随着风力发电规模和风电机组单机容量不断增大,要求大型风电机组具有低电压穿越能力,因此需要研究三相对称故障下双馈风力发电机控制方法.在电网电压突然跌落时,由于双馈发电机中的电磁耦合关系,在定转子中感应出过电压过电流,为保护转子侧变换器,需要通过crowbar来短路双馈发电机的转子.针对传统的passive crowbar的不足,采用active crowbar电路的控制方法.当电网故障造成双馈发电机转子过流时,开启active crowbar电路来旁路转子侧变换器.当转子电流下降到一定程度时断开crowbar,转子侧变换器恢复工作,此时双馈电机可以向电网同时提供有功无功支持.理论分析的基础上进行了仿真研究.仿真结果证实了采用active crowbar可以有效地实现双馈风力发电机的低电压穿越.
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| 关 键 词： | 双馈发电机 对称故障 风力发电 低电压穿越 |
Research on control of DFIG with active crowbar under symmetry voltage fault condition |
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| ZHANG Xue-guang,XU Dian-guo.Research on control of DFIG with active crowbar under symmetry voltage fault condition[J].Electric Machines and Control,2009,13(1). |
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| Authors: | ZHANG Xue-guang XU Dian-guo |
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| Affiliation: | Department of Electrical Engineering;Harbin Institute of Technology;Harbin 150001;China |
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| Abstract: | With the development of wind power generation system,LVRT(low voltage ride through)ability in grid fault condition is required for wind generator,so it's necessary to research on the control method of DFIG(doubly fed induction generator) under symmetry voltage fault condition.During the occurrence of a grid fault,because of electromagnetic relationship in DFIG,over current way induced in stator and rotor winding.In order to protect the converter,crowbar was used to short DFIG rotor.When over current was ind... |
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| Keywords: | active crowbar |
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